clarke



(No Model.) A 2 Sheets-Sheet l.. A. D. CLARKE.

MACHINE FOB. GONGENTRATING GOLD, &c.

Patented Aug. 24, 1886.

N PETERS. Pnom-Limugnpher, washingm. D.C.

(No Model.)

I 2`Sheets-Sheet 2. D. CLARKE.

MACHINE FOR NCENTRATING GOLD, 656. N0. 347,771.

Patented Aug. 24, 1886.

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UNITED Si Ares vParitair rtree..

ALEXANDER. D. CLARKE, or NEW Yoan, N. Y.

SPECIFICATION forming part of Letters Patent No. 347,771, dated August24, 1886. Application filed September' 22, 1885. Serial No. 177,700. (Nomodel.)

To all whom it may. concern:

Bei t. known that I, ALEXANDER D. CLARKE, a citizen of the UnitedStates, residing inNoW York, in the county of New York and State of NewYork, have invented anew and useful Improvementin Machines forConcentrating Gold, Sto., of which the following is a specilication.

This invention relates to that class of orceoncentrators employing atank, wherein the current of water carrying the minera-l dirt or Ore isdivided' into upper and lower portions, the former containing thelighter or more easily tioatable gold, and the latter the heavierparticle. The special form of this tank which I have employed is shownin application No. 147,558, filed by me November 10, 1884, (sincepatented in Patent No. 328,006, dated October 13, 1885.) In said tank isa nearly horizontal platform in such proximity to the supply-sluice asto receive the top portion of the current and conduct it toward theltering-table, and said platform is provided with a door by which it maybe made to extend to and connect directly with the supply-sluice andreceive the entire discharge therefrom, this door being closed only whenthe platform is to be washed free of collections of sediment, &c., andthe supply ol' dirt being shut off during the operation. Inconcentrating-machines embodying two or more ot' these tanks thestoppage' of operation of the entire machine while one plat4 form andone tank are being washed out may be avoided bythe use of my presentimprovemeut, which consists in the novel features of Construction andcombinations of parts, hereinafter fully set forth and claimed.

Figure 1 of the acccompanying drawings form-ing a part of thisspecification, is a central longitudinal section of one of thedividingtanks and the parts immediately adjacent thereto, showing mypresent improvements. Fig. 2 represents a eoueentrator embodying` two ofthe tanks, a plan View of one being given, and a horizontal section ofthe other uponl the line 2 2 of Fig. 1. Figs. S, 4, and 5 are verticaltransverse sections upon the lines 3 3, 4 4, and 5 5, respectively, ofFig. 1. Fig. 6 is a central longitudinal vertical section of one of thedividing-tanks somerescued.

what modified from Fig. 1. Fig. 7 is aplan of the modified tank. Fig. 8is an enlarged vertical cross-section of the supplemental washing-streamsupplying chamber or conduit.

ln said drawings, II represents the dividing-tank, I the verticalpartition therein, and I the gate controlling the passage under saidpartition.V G is the transverse sl uice receiving the commingled ore andWater, and having a gate. G2, regulating the delivery therefrom.Platform I2 receives the current from G, and delivers it to thedividingtank H. The platform M, horizontal, or nearly so, assists inseparating the top and lower portions of the stream, the top portionflowing past the open space intervening between the platforms l2 and Monto the latter, which conducts it to the farther end of tank H, whereit naturally Hows onto table L, and is filtered by the file ters on thelatter, the light gold being thus falls between platforms 12 and M, andpasses under partition I onto the concentrating-tables J. Nis the door,by the lowering whereof the platforms are joined. All these features arefully explained in my said application of November 10, 1884.

In a double or other concentrator having two or more of the tanks H, Iplace in the feeding-sluice F, which discharges in the usual` mannerinto the sluices G. a gate, F', hinged vertically atf, so that it may beswung to either side of said sluice, and the entire current be divertedto one side or the other, as desired, thereby leaving one ofthe tanksfree to be cleaned without stopping the operation of the other.

The supplemental supply of water for washing the tank and platform Iobtain through the pipe Q, connecting with a chamber or passage, R, uponplatform I2. The pipe Q is preferably provided with a valve, T, thoughthe water may bccontrolled at the source and the valve dispensed with.The water issues from chamber R through a longitudinal opening, r,therein, and, the door Nbeinglowered, flows directly overthe platform Mand ceanses it of all scttlings.

The supplemental discharge may be coutrolled by providing opening frwith a dooror The under portion of the current valve, s, secured by anysuitable fasteningas, for instance, the button s. The dotted lines, Fig.8, show the button released and the door swung open. This door or someequivalent means for shutting the orifice r will be found necessarywhere two or more chambers, R, are connected together in such mannerthat some one or more of theln receive water through the others, as bymeans of such door the fiow may be shut offexcept at the particular tankwhich it is desired to clean.

The chamber It may be located at the side of sluice G, if that ispreferred, and Vwhere the platform L is not present.. such is thecorrect construction. This is illustrated at Figs. 6 and 7, and in thiscase the water issues more directly into tank H, both from the sluice Gand chamber R.

\Vhen the platform M is to be washed the commingled water and ore areshut of'feither at the gate Grl or gate F. and the supplemental supplyadmitted. Vhere two or more tanks are used in connection with a singlechute, F, the flow through such chute may continue nninterrupted whileany one of the tanks is being washed by the supplemental stream, the dowfrom chute F being shut off from the tank being cleansed, but not fromthe others. This feature of my invention economizes time byavoiding'stoppages heretofore necessary when thcvsediment is removedfrom tanks H.

The bottom of tank H is so modified as to facilitate the cleaningoperation. That portion thereof under the platform M is contracted bymeans of strips o into a narrow channel or throat, O, and the point P,where the floor ol' the tank begins to descend at ,arsharper angle thanunder platform M, is slightly higher than the highest point,p, of tableJ at the other side of tank H, so that when the tank is being cleansedt-he water flowing over the platform M and entering throat O finds aconstantly lower level and carries the sediment with it. The platform Mis provided with a hinged door, V, whereby access may be had to throatO, when desired.

The door N is provided with one or more removably-attached slats, n n a,which are intended to be removed when the platform is extended towardsluice G. by loweiing said door, thereby enabling the door to be changedto correspond in width with the width of the open space between slnice Gor platform I2 and platform M.

It will be noticed that the construction of chamber R is such as topermit a solid stream or sheet of water of no inconsiderable volume toflow therefrom into the dividi ng'tank. This distinguishes mysupplemental water supply .N, in combination with supplementalwatersnpplying devices R, one for each tank, l'ocated and operatingsubstantially as specified. 2. The stationary supplemental water-supplychamber R, having the longitudinal opening o', enabling it to dischargethe water in a stream or sheet, as set forth. and its supplypipe, incombination with tank H, substantially as set forth.

3. The sluice G, discharging directly into tank H,in combination withsaid tank and its platform M, substantially as specified.

4. The tank H, having a platform, M, a door, N, and a contracted throat,O, under said platform, substantially as specified.

5. In combination with tank H, having the contracted throat O, theplatform M, having the door V, located over said throat, substantiallyas specied.

6. In an ore-concentrator, the combination of two orvmoredividing-tanks, a single sluice, F, supplying said tanks, a gate, F',regulating the supply from said sluice, and supplemental 'chamber R, forsupplying cleansing-water to such tanks when the supply from sluice F isshut off, substantial] y as specified.

7. The combination, with tank H and the feed-inlet thereof', of platformM, and door N, the latter provided with removableslats, sub stantiallyas specified.

ALEXR. '1). CLARKE.

Witnesses:

Enw. S. Evan'rs, H. W. MUNDAY.

